Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Goodwill) (Details)

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Goodwill and Other Intangible Assets (Goodwill) (Details)
$ in Millions
Mar. 31, 2016
USD ($)
Goodwill [Roll Forward]  
Goodwill, Beginning Balance $ 14,345
Goodwill, Ending Balance $ 14,345